For fly lines, I find Wulff lines are excellent & half the price of Rio. I had a Rio line once - forgot what it was called, but the fly line landed like a 747 at Heathrow. Snowbee are good and less expensive still, but your floating line will be a midge tip after a couple of seasons. I have a Pheonix silk fly line - very nice, I think Rio are in a spot where I wonder if its worth it - 120 - might as well go the whole hog and get that silk fly line for a one off, or get a line like Wulff etc..
I do wonder about the price and if its just to entice people by suggesting superiority. But all firms do that - I remember a few years ago: we all had to rush out and buy single handed spey rods (not the switch rods of course, they were completely different) as a compliment to the Tenkara rod that we all had to switch to.
(as an aside , I used to post regularly but 'lost' my old email, anyone know if its possible to 'retrieve' your old account in those circumstances?)